A useful starting calculation
For a straightforward French press comparison, start around 1 gram of coffee to 15 or 16 grams of brew water. Adjust within that range to suit the coffee and the strength you enjoy. Stumptown's published guide uses 56 grams of coffee with 850 grams of water, approximately 1:15.2, as part of its own complete four-minute method.
The French press steeps grounds in water before a mesh filter separates most of them from the drink. Its texture differs from paper-filtered coffee because fine particles and oils can reach the cup. A heavier mouthfeel does not by itself mean the drink has a higher concentration or that more material was extracted.
Match the batch to your brewer
Use the actual water capacity you can brew safely, leaving room for coffee and the lid. A manufacturer's cup label is not a reliable description of your favorite mug. Weigh the planned water; an eight-cup press can hold fewer than eight of your usual servings.
| Coffee | Water at 1:15 | Water at 1:16 |
|---|---|---|
| 20 g | 300 g | 320 g |
| 30 g | 450 g | 480 g |
| 40 g | 600 g | 640 g |
Keep ratio and steeping technique separate
Choose one tested sequence and keep it steady while comparing ratios. For an editorial starting batch, 30 grams of coffee with 450 grams of water gives a convenient 1:15 calculation. Follow a consistent grind, wet all the coffee, and record when you stir and separate the drink from the grounds. If you use Stumptown's method, keep its four-minute point with the accompanying steeping sequence.
Press with controlled, gentle pressure on a stable counter. Do not push down on a scale, and do not force a resistant plunger. Decant the drink you intend to serve into another vessel instead of leaving the remaining coffee in the press while you finish the first cup.
Choose the next change by taste
When the cup tastes pleasant but stronger than you want, add a little hot water to a sample. If you prefer the diluted sample, test slightly more brew water or slightly less coffee in the next batch. Keep that adjustment small enough that you can explain what changed.
If the cup tastes gritty, reducing the coffee dose may simply produce a thinner gritty drink. Check the condition of the mesh, your grind distribution, how the press is handled, and whether sediment is being poured into the mug. If the coffee tastes sharp, flat, or drying, consider grind, temperature, coffee freshness, and steeping method alongside the ratio.
Make the recipe portable
Save the coffee mass, water mass, grind description, temperature, steeping sequence, and the amount served. A larger batch may retain heat differently from a small one, even when both have the same ratio. The dose table scales the ingredients; it cannot guarantee the same flavor without checking the process.
After brewing, allow the equipment to cool enough to handle and clean it according to its instructions. Old residue caught around the filter can affect a later cup and make a good ratio seem unreliable. If a familiar recipe starts tasting different, check for residue around the filter before changing its ratio.